Surgical incision and closure apparatus with integrated force distribution
Apparatus for closing a surgical incision comprise a base having left and right panels, a force distribution structure coupled to each panel, and a closure component which releasably attaches to the force distribution structure to draw the inner edges of the panels together in order to close adhered tissue edges. The force distribution structures allow the inner edges of the panels to expand while restraining expansion of the outer edges of the panels and limiting elongation of the lateral dimension of the panels. The incision closure appliance may be placed on skin or other tissue prior to forming the incision to be available to close said incision at the end of the surgical procedure.
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This application is a continuation-in-part of U.S. patent application Ser. No. 13/286,757, filed Nov. 1, 2011, the full disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION1. Field of the Invention
The present invention relates generally to medical apparatus and methods. More particularly, present invention relates to apparatus and methods for forming and closing surgical incisions.
Surgical closure devices including an adhesive based patch with right and left panels are known. Of particular interest of the present invention, such devices are described in co-pending, commonly owned PCT application US 2010/000430, full disclosure which is incorporated herein by reference. As described in the PCT application, an adhesive patch is placed over a patient's skin at a site where it is desired to form a surgical incision. After the patch is placed, an incision is formed along an axial line extending through the middle of the patch. After it is formed, the incision can be opened to perform a desired procedure, and after the procedure is completed the incision may be closed by drawing the inner edges of the panels together with a clip, zipper, or other closure member.
The principal objective of such surgical closure devices is to improved healing and reduce scaring from the incision. This objective, however, has been inhibited by certain characteristics of the presently available devices. For example, the tissue edges are not always brought together along an even line, which can increase the eventual scaring. Many such closure devices do not have the ability to adjust the closure force or distance on the tissue edges, limiting the ability to slightly “pucker” tissue which has been found to reduce scaring. Other shortcomings of the available incision and wound closure devices include difficulty of use and inability to conform to tissue manipulation during subsequent surgical protocols, i.e. those devices which are sufficiently rigid to securely close the tissue are often unable to conform to the tissue movement during the surgical procedure.
A particular problem arises with self-adhesive wound closure patches when they're used beneath an adherent surgical incision drape. Such drapes are used to help maintain the sterility of a tissue surface during a surgical procedure, and the drapes may be placed over a previously positioned tissue closure patch. As the surgical incision drape has an adhesive lower surface which adheres to the tissue, the drape will adhere to an upper surface of an underlying tissue closure patch. Removal of the surgical incision drape will thus often remove or at least displace a previously placed tissue closure patch. If any significant portion of the tissue closure patch is removed or displaced, the patch will no longer be useful for closing a surgical wound.
For these reasons, it would be desirable to provide improved surgical incision closure devices and methods for their use. It would be particularly desirable to provide incision closure devices which are able to adhere to the tissue, allow formation of the incision, conform to the deformation of the tissue during a subsequent surgical procedure, and provide controlled closure of the adjacent tissue edges subsequent to the procedure. In particular, it would be desirable if the incision closure devices were able to provide for the control and the uniform distribution of closure forces on the tissue edges while causing minimum restraint or stretching of the tissue during the surgical procedure. It would be still further desirable to provide improved surgical incision closure devices and methods for their use where the devices will resist removal and dislocation when used beneath a surgical incision drape. At least some of these objectives will be met by the inventions described below.
2. Description of the Background Art
Co-pending, commonly owned PCT application US 2010/000430 as been described above. Other surgical closure devices are described in the following U.S. Pat. Nos. 2,012,755; 3,516,409; 3,863,640; 3,933,158; 4,114,624; 3,926,193; 4,535,772; 4,676,245; 4,881,546; 4,905,694; 5,377,695; and 7,455,681; and U.S. Patent Publication Nos. 2005/0020956 and 2008/0114396. Commercial incision closure devices available from Ethicon, a division of Johnson & Johnson, under the trade name Ethizip™ temporary abdominal wound closure device.
SUMMARY OF THE INVENTIONThe present invention provides improved apparatus and methods for closing wounds, particularly wounds resulting from incisions performed during surgical procedures. The incisions would usually be formed in a patient's skin, such as through the abdomen, but in some cases could also be on internal organs, within the oral cavity, within body cavities, or alike.
The devices and methods of the present invention will present minimum disruption of or interference with the surgical procedure which is performed after the incision is made. In particular, the devices and methods will permit the opposed edges of the incised tissue to be opened, stretched, and freely deformed with minimal restraint resulting from the presence of the closure device. Once the procedure has been completed, however, the devices and methods of the present invention will provide for a uniform distribution of closure forces to draw the tissue edges together in a manner which and minimize scaring. In particular, the closure devices can draw the tissue edges together at a slightly closer spacing than initially present at the forming of the incision in order to upwardly evert the tissue edges cause a “pucker” which can reduce scaring.
The devices and methods of the present invention will also be able to avoid or reduce disruption when a incision closure appliance is used beneath surgical incision drape which must be removed from over the closure appliance. A sacrificial layer is provided over at least part of the upper surface of the closure appliance, where the sacrificial cover is held in place while the surgical incision drape is placed over the incision closure appliance. After the incision and surgical procedure have been completed, the surgical incision drape will be pulled from the patient's skin. Instead of adhering to and dislodging the tissue closure appliance, the surgical drape adheres to the sacrificial cover, and only the sacrificial cover is pulled from the patient with the drape, leaving the remainder of the incision closure appliance in place.
In a first aspect of the present invention, an incision closure appliance comprises a base including a left panel and a right panel. Each panel has a tissue adherent lower surface, an upper surface, an inner edge, and an outer edge. The lower tissue adherent surface will typically be coated at least partially with a common tissue-adherent adhesive such as those used in surgical bandages and patches.
The incision closure appliance further includes a force distribution structure coupled to each panel (i.e. each panel will have at least one force distribution structure coupled thereto), where each force distribution structure is adapted to allow axial expansion of the panel along the inner edge while limiting lateral expansion over the entire length and axial expansion along the outer edge. By permitting axial expansion of the panel along the inner edge, the tissue edges are minimally constrained to allow the tissue to deform when stretched during the surgical procedure. Conversely, by limiting both lateral expansion and axial expansion along the outer edge, the panel will be able to apply a controlled and distributed closure force when the panels are drawn together after the surgical procedure is complete, as described in more detail below.
The incision closure appliance still further includes a closure component or assembly which attaches to the force distribution structure to draw the inner edges of the panels together after they had been adhered to the tissue on opposite sides of an incision site and the surgical procedure completed. Each panel of the base will typically comprise an at least partially elastic matrix, typically having an isotropic elasticity (i.e. the panel stretches evenly in all directions) but optionally having an anisotropic elasticity (where the matrix stretches preferentially in one direction or over a portion thereof). The elastic matrix may comprise an elastomeric membrane or sheet (for example Polyurethane sheet or Thermo Plastic Elastomers (TPE)), a woven fabric (typically woven at least partially from elastomeric filaments, threads, or fibers), a spun fabric, or the like. In certain embodiments, the elastomeric matrix may comprise a fabric woven from both elastic elements (typically threads, filaments, fibers, or the like) and having inelastic elements disposed along the outer edge and extending laterally there across in order to provide the expansion characteristics described above with respect to the force distribution structure. That is, in some cases, the force distribution structure may include or consist of inelastic elements woven or otherwise incorporated within a fabric membrane.
Typically, the force distribution structure will comprise a separate component of the incision closure appliance, for example including a spine disposed axially adjacent to the outer edge of the panel and a plurality of axially spaced-apart lateral supports disposed laterally and extending from the spine toward the inner edge of the panel. Such a “comb-like” structure will typically be formed from flexible but non-distensible materials so that the elements can flex together with the tissue deformation but will not stretch along their lengths so that they may provide dimensional stability in the lateral direction as well as along the outer edge of the panel. Examples of such materials include Nylon, Polypropylene, Polyethylene and Polycarbonate or other thermo polymers. Notably, the force distribution structure will not limit the axial stretching of the inner edge of the panel in order to provide the desired expansibility and conforms to the tissue during the surgical procedure. Such separate force distribution structures may be attached to the upper surface of the panel, or alternatively may be embedded in or laminated within the panel. Typically, the force distribution structure will not extend into or past the lower surface of the panel so that it will not interfere with adherence of the panel to the skin or other tissue.
The assembly of the base panels and the force distribution structures will typically be carried on a removable backing which covers and protects the adherent surface of the panels prior to use. The adherent backing may be removed in order to apply the base to the skin or other tissue at the site of the surgical intervention. Additionally, the right and left panels will typically be held together by removable tabs, an axial strip, or other removable covers or structures in order to hold the inner edges of the panel at a pre-determined distance or spacing as they are being adhered to the tissue. For example, removable tabs may be placed at each axial end of the base to temporarily secure the two base panels together. Alternatively, a removable strip or tape may be placed over an axial gap between the right and left panels to hold the panels in place relative to each other as the base is being adhered to the tissue surface. Such tabs or strips will typically be self-adhesive so that they may be secured to the panels and then removed by simply pulling off after the panels are properly placed. The cover, tabs, or strip may then be removed to leave the panels in place but unconnected prior to forming the surgical incision therebetween.
A first exemplary construction of the closure component or assembly comprises a right engagement member, a left engagement member, and a plurality of lateral struts holding the engagement members laterally apart by a pre-determined distance. The right engagement member is adapted to releasably engage the supports of the right panel along an inner edge thereof, and the left engagement member is adapted to releasably engage the supports of the left panel along an inner edge thereof. In the specific embodiments, at least some of the supports of the force distribution component will have cleats near their inner edges, and the engagement members will have slots which receive the cleats. After the surgical intervention is complete, the closure component may then be placed over the force distribution structure with the cleats on one side first being engaged by an engagement member and then the opposite engagement member being pulled over the cleats on the opposite side.
Alternatively, the closure component or assembly may comprise a plurality of independent lateral ties attached to at least some of the lateral supports. Such lateral ties are configured to be secured between the lateral supports, typically being fixed to one panel and being adjustably attachable to the other panel. For the exemplary embodiments, the adjustably attachable end may comprise a ratchet tightening mechanism or similar structure which allows each lateral tie to be independently adjusted at a different spacing between the right and left panels. In this way, the right and left panels may be differentially tensioned along their inner edges in order to control and optimize the forces applied to the adjacent tissue edges which are being drawn together.
Optionally, the closure appliance of the present invention may further comprise a securing layer which is adapted to be placed over the assembly of the base and the closure component after the assembly has been secured over an incision on a patient's skin and the surgical procedure has been completed. A securing layer will typically have a self-adhesive lower surface which can be placed over the assembly of the base and closure component to help secure it in place and to maintain cleanliness. The securing layer may optionally have openings to permit access to the wound for observation, delivery of antiseptics, and the like.
In a further aspect of the present invention, methods for forming an incision in tissue comprise providing an incision closure appliance as described above. The right and left panels of the appliance are adhered to the patient's skin, where the inner edges of the panels are spaced-apart by a pre-selected distance typically from 0.5 mm to 15 mm. An incision (typically linear) is formed in the tissue or skin surface between the inner edges of the panels, and the edges of the incised tissue are then separated to perform a desired surgical procedure. The inner edges of the panels can stretch and conform along with movement and deformation of the tissue edges while the outer edge and lateral extent of each panel remain dimensionally stable. After the procedure is complete, the closure component is secured to the force distribution structure to draw the inner edges of the panels back together. Optionally, the closure component has dimensions (or an adjustable inter-panel spacing) which draw the tissue edges closer together than they were immediately after the incision was formed. Such drawing together of the tissue causes the edges to evert and the tissue to “pucker” which can reduce scarring.
The apparatus and methods of the present invention will be used during both the formation and the closure of surgical incisions made to a patient's skin or other tissue during surgical procedures. As described hereinafter, the direction of the incision will define both “axial” and “lateral” directions as those terms are used herein. Most incisions will be made along a generally straight line which will define the axial direction. The lateral direction will generally be across the axial direction, typically but not necessarily being perpendicular or normal to the axial direction. Most incisions will be generally linear but in some cases the incisions could be curved or have other geometries. The term “axial” will then apply to the direction of the incision at any particular location, resulting in lateral directions which could also vary.
Referring now to
The closure component 22 is intended and adapted to draw the inner portions of the force distribution structures 18 and 20 inwardly toward each other to close a surgical incision which has been formed therebetween. In the illustrated embodiment, a plurality of cleats 26 are formed on lateral supports 36 which are held axially by spine 37 of the force distribution structures 18 and 20. The cleats 26 are received in slots 38 formed along inner edges of opposed engagement members 40 of the closure component 22. The opposed engagement members 40 are held together by lateral struts 42 so that the engagement members are held at a fixed, laterally spaced-apart distance (in other embodiments the spaced-apart distance may be adjustable). The slots 38 are preferably formed on flexible tab-like structures 44 which allow the slots to be pulled upwardly over the corresponding cleats in order to secure the closure component 22 over the force distribution structures 18 and 20.
The lower surfaces 32 of each panel 18 and 20 will typically be covered with a pressure-responsive adhesive, where the adhesive is initially covered with a protective layer 48 which may be peeled away immediately prior to use. Additionally, pull-away tabs 50 or other similar structures may be provided in order to hold the right and left panels 14 and 16 together at a pre-determined spaced-apart distance after the layer 48 has been removed but prior to adhering the panels to a patient's skin or other tissue surface. It is important that the distance between the inner edges 28 of each panel 14 and 16 be maintained as close as possible to the original target spacing so that the tissue edges, when closed by the closure component 22, will be precisely brought together, typically with a slight eversion.
Referring now to
After the right and left panels 14 and 16 are in place, an incision I can be formed in the space between the panels using a scalpel or other surgical cutting device CD, as shown in
After the incision I is made, a surgical procedure may be performed by opening the inner edges of the incision which in turn deforms the inner edges 28 of the right and left panels 14 and 16, as shown in
After the surgical procedure is complete, the closure component 22 will be secured over the force distribution structures 18 and 20, as illustrated in
Optionally, as shown in
An alternative embodiment 100 of the incision closure appliance of the present invention is illustrated in
The incision closure appliance 100 further includes a backing 110 having an end which may be partially folded back to expose an underlying adhesive backing on the panels and allow that end of the base assembly 102 to be adhered to the tissue while the remainder of the base assembly is still covered by the backing. A securing layer 112 which includes a reinforcement frame 113 is provided for placement over the right panel 104 and left panel 106 after the base assembly 102 has been closed over an incision, generally is described in connection with the previous embodiment. Usually, a holding tray 114 will be provided for maintain the components of the appliance together in a sterilized condition where the tray 114 will be covered with conventional medical packaging cover.
As illustrated in
The incision closure appliance 100 will include a closure mechanism comprising a plurality of lateral tie assemblies 128 as shown on
Referring now to
The left force distribution structure 144 includes a ratchet mechanism 160 adapted to receive the teeth 162 on the rod 154 of the right force distribution structure. In this way, the rod 154 can be lowered into the ratchet 160 to engage teeth 162, allowing the rod to be pushed forward in order to draw the right and left force distribution structures 142 and 144 together in order to apply tension to the right and left panels.
As illustrated in
The right panel 104 is covered by a right sacrificial cover 170 and the left panel 106 is covered by a left sacrificial cover 172. Each cover 170 and 172 is detachably secured along each edge of the associated base panel so that the covers remain in place during normal handling and placement of the incision closure appliance 100 over the tissue surface to be incised. The use and purpose of these sacrificial covers 170 and 172 is described with reference to
After the incision drape 180 is in place over the incision closure appliance, a surgical incision I may be made for performing a desired surgical intervention. As can be seen, the incision I will cut through the surgical drape 180 between the right and left panels 104 and 106, respectively. After the surgical procedure is completed, the surgical drape 180 will be removed from the tissue surface T. As the surgical drape has a lower adherent surface, prior to the present invention, removal of the drape might have displaced either or both of the right panel 104 and left panel 106. Presence of the sacrificial layers 170m and 172, however, prevents such displacement. Removal of the surgical drape 180 will remove the sacrificial layer 170 and 172, but as each of these layers is configured to break off with a relatively low separation force, removal of the sacrificial layers will not cause the underlying panels 104 or 106 to be displaced. Thus, the panels 104 and 106 will be left in place, as shown in
Claims
1. An incision closure appliance comprising:
- a base including a left panel and a right panel, each panel having a tissue adherent lower surface, an upper surface, a longitudinal axis, an inner edge, and an outer edge;
- left and right force distribution structures coupled to the left and right panels, respectively, wherein each force distribution structure comprises an axial spine disposed substantially parallel to the longitudinal axis of the left or right panel and a plurality of lateral supports extending laterally from the axial spine and disposed substantially perpendicularly to the longitudinal axis of the left or right panel, wherein the axial spine and the plurality of lateral supports are integral with one another, wherein the lateral supports are axially separate and spaced apart from one another, wherein the force distribution structures are configured to allow the inner edges of the panels to expand while restraining expansion of the outer edges of the panels, and wherein the axial spine and lateral supports are configured to preserve dimensional stability of the panels when the panels are deformed; and
- a closure assembly securable to the left and right panels to draw the inner edges of the panels together, wherein the closure assembly comprises one or more lateral ties, each lateral tie having a fixed end fixedly coupled to one of the left or right force distribution structures and a free end opposite the fixed end, the free end being adjustably coupled to the opposing left or right force distribution structure.
2. An incision closure appliance as in claim 1, wherein each panel of the base comprises an elastic matrix.
3. An incision closure appliance as in claim 2, wherein the elastic matrix comprises an elastomeric membrane, a woven fabric, or a spun fabric.
4. An incision closure appliance as in claim 2, wherein the elastic matrix comprises a fabric woven from elastic elements and having inelastic elements along the outer edge and extending laterally thereacross.
5. An incision closure appliance as in claim 2, wherein the elastic matrix is isotropic.
6. An incision closure appliance as in claim 1, wherein the axial spine of each force distribution structure is disposed axially adjacent to the outer edge of the panel, and wherein the plurality of lateral supports are axially spaced-apart and extend laterally from the axial spine toward the inner edge of the panel.
7. An incision closure appliance as in claim 1, wherein the axial spine and lateral supports are formed from flexible, non-distensible materials.
8. An incision closure appliance as in claim 1, further comprising a removable space maintainer which holds the right and left panels at a fixed distance while they are being adhered to tissue.
9. An incision closure appliance as in claim 8, wherein the removable space maintainer comprises a strip which is removably placed over an axial gap between the right and left panels.
10. An incision closure appliance as in claim 1, wherein the fixed end of each lateral tie is fixedly coupled to the axial spine of the one of the left or right force distribution structures.
11. An incision closure appliance as in claim 1, wherein the free end of each lateral tie is adjustably coupled to the opposing left or right force distribution structure with an adjustable ratchet tightening mechanism.
12. An incision closure appliance as in claim 1, further comprising a securing layer adapted to be placed over an assembly of the base and the closure assembly after the assembly has been secured over an incision on a patient's skin.
13. An incision closure appliance as in claim 12, wherein the securing layer has an inner self-adhesive surface.
14. An incision closure appliance as in claim 1, wherein the fixed end is integral with the one of the left or right force distribution structures.
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Type: Grant
Filed: Oct 31, 2012
Date of Patent: Nov 13, 2018
Patent Publication Number: 20130296930
Assignee: ZipLine Medical, Inc. (Campbell, CA)
Inventors: Amir Belson (Los Altos, CA), Eric Storne (Menlo Park, CA), Eric T. Johnson (Temecula, CA), Robert R. Ragland (Temecula, CA), Phillip C. Burke (Pala, CA), Luke Clauson (Redwood City, CA)
Primary Examiner: Christopher L Templeton
Assistant Examiner: Majid Jamialahmadi
Application Number: 13/665,160
International Classification: A61B 17/08 (20060101); A61B 17/00 (20060101); A61B 17/02 (20060101); A61B 17/04 (20060101);